Improvements in reduction of feed contamination: An alternative monitor of bacterial killing during feed extrusion

Journal of Applied Poultry Research

Volumn 17, Issue 2, 2008, Pages 219-228

  Okelo, P O ^a,b   Joseph, S W ^c   Wagner, D D ^a   Wheaton, F W ^b   Douglass, L W ^b   Carr, L E ^b  

^a CENTER FOR DRUG EVALUATION AND RESEARCH   (United States)

^b UNIVERSITY OF MARYLAND   (United States)

^c University of Maryland   (United States)

Author keywords

Animal feed; Bacillus stearothermophilus; Extrusion; Feed; Salmonella typhimurium; Spore; Sterilization; Surrogate

Indexed keywords

ANIMALIA; BACTERIA (MICROORGANISMS); GEOBACILLUS STEAROTHERMOPHILUS; SALMONELLA TYPHIMURIUM;

EID: 53649108372     PISSN: 10566171     EISSN: None     Source Type: Journal    
DOI: 10.3382/japr.2007-00060     Document Type: Article

References (38)

1. Busta, F. F., T. V. Suslow, M. E. Parish, L. R. Beuchat, J. N. Farber, E. H. Garrett, and L. J. Harris. 2003. The use of indicators and surrogate microorganisms for the evaluation of pathogens in fresh and cut produce. Compr. Rev. Food Sci. Food Saf. 2 (Suppl.):179-185.
2. Wyatt, R. D. 1995. Molds, mycotoxins, and the problems they cause. Pages 33-44 in Proc. Alltech's 11th Annu. Symp. Biotechnology in the Feed Industry. Redwood Books, Trowbridge, Wiltshire, UK.
3. Cox, N. S., D. Burdick, J. S. Bailey, and J. E. Thomson. 1986. Effect of steam and conditioning process on the microbiology and quality of commercial-type poultry feeds. Poult. Sci. 65:704-709.
4. Schleifer, J. H., B. J. Juven, C. W. Beard, and N. A. Cox. 1984. The susceptibility of chicks to Salmonella montivideo in artificially contaminated poultry feed. Avian Dis. 28:497-503.
5. Levine, L. 1992. Extrusion processes. Pages 621-666 in Handbook of Food Engineering. Marcel Dekker, New York, NY.
6. Ng, T. M., and D. W. Schaffner. 1997. Mathematical models for the effects of pH, temperature and sodium chloride on the growth of Bacillus stearothermophilus in salty carrots. Appl. Environ. Microbiol. 63:1237-1243.
7. Russel, A. D. 1982. The Destruction of Bacterial Spores. Academic Press, New York, NY.
8. de Guzman, A., M. L. Fields, R. D. Humbert, and N. Kazana. 1972. Sporulation and heat resistance of Bacillus stearothermophilus spores produced in chemically defined media. J. Bacteriol. 110:775-776.
9. Mayou, J. L., and J. J. Jezeski. 1977. Effect of using milk as a heating menstrum on the apparent heat resistance of Bacillus stearothermophilus spores. J. Food Prot. 40:228-231.
10. Doyle, M. P., L. R. Beuchat, and T. J. Montville. 2000. Spores and their significance. Pages 35-68 in Food Microbiology, Fundamentals, and Frontiers. ASM Press, Washington., DC.
11. 1/4 where α = units, of additional factor, along the coordinates in the central composite statistical design space and n = number of independent variables.
12. Okelo, P. O., D. D. Wagner, L. W. Carr, F. W. Wheaton, L. W. Douglass, and S. W. Joseph. 2006. Optimization of extrusion conditions for elimination of mesophilic bacteria during thermal processing of animal feed mash. Anim. Feed Sci. Technol. 129:116-137.
13. A nalidixic acid resistant strain from the laboratory culture collection of Sam W. Joseph, Department of Cell Biology and Molecular Genetics, University of Maryland, College Park.
14. Rose, N., F. Beaudeau, P. Drouin, J. Y. Toux, V. Rose, and P. Colin. 1999. Risk factors for Salmonella enterica subsp. enterica contamination in French broiler-chicken flocks at the end of the rearing period. Prev. Vet. Med. 39:265-277.
15. Difco, Sparks, MD.
16. Triangle A & E Incorporated, Oklahoma City, OK.
17. American Association of Cereal Chemists. 1995. AACC method 42-40: Thermophilic spore counts. In Approved Methods of the American Association of Cereal Chemists Incorporated. 9th ed. Am. Assoc. Cereal Chem. Inc., St. Paul, MN.
18. American Association of Cereal Chemists. 1995. AACC method 42-25A: Salmonella bacteria. In Approved Methods of the American Association of Cereal Chemists Incorporated. 9th ed. St. Paul, MN.
19. Smith, A. C. 2000. Exploring new cultures: Microbial growth and control of microbial growth. Pages 79-93 in A Laboratory Manual for General Microbiology. 3rd ed. Pearson Custom Publishing, Needham Heights, MA.
20. Extru-tech, Sabetha, KS. Brand names are used in this article for clarity only and do not imply endorsement by the University of Maryland or US Food and Drug Administration.
21. American Type Culture Collection, Hendon, VA.
22. van de Velde, C., D. Bounie, J. L. Cuq, and J. C. Cheftel. 1984. Destruction of microorganisms and toxins by extrusion cooking. Pages 155-161 in Thermal Processing and Quality of Foods. Elsevier, New York, NY.
23. Ocio, M. J., P. Fernandez, F. Rodrigo, and A. Martinez. 1996. Heat resistance of Bacillus stearothermophilus spores in alginate-mushroom puree mixture. Int. J. Food Microbiol. 29:391-395.
24. Difco Laboratories. 1998. Difco Manual, 11th ed. Difco Laboratories, Division of Becton Dickinson and Company, Sparks, MD.
25. Madigan, M. T., J. M. Martinko, and J. Parker. 2000. Measurement of growth. Page 141 in Brock Biology of Microorganisms. Prentice Hall, Upper Saddle River, NJ.
26. -7 mL), and DF = dilution factor (dimensionless).
27. 2 = combined volume of sample and diluent (mL).
28. -7).
29. -7).
30. FI = spore concentration in feed inoculum (cfu/g of feed), and MMP = mass of mash feed (kg).
31. -1 each were serially made from the initial suspension.
32. -1 each of this.
33. predicted = density of vegetative form of spores of B. stearothermophilus based on amount of feed inoculum added to a known amount of nonspiked mash feed (cfu/20 g of feed).
34. control = density of vegetative form of spores of indigenous thermophilic bacilli recovered from control (nonspiked) mash feed sample using a specified enumeration media (cfu/20 g of feed).
35. D = targeted (desired) moisture content of feed (% wb).
36. dry = mass of feed sample after drying (g).
37. American Association of Cereal Chemists Incorporated. 1995. AACC method 44-01: Calculation of percent moisture. In Approved Methods of the American Association of Cereal Chemists Incorporated. 9th ed. Am. Assoc. Cereal Chem. Inc., St. Paul, MN.
38. American Optical Company, Buffalo, NY.